Chracteristics of Vibraition-induced Wind Forces on Large Span Roofs

大跨度屋顶振动诱发风力特性

• 批准号: 61550419
• 负责人: OHKUMA Takeshi
• 金额: $ 1.34万
• 依托单位: KANAGAWA University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61550419/
• 关键词: Larg span roof; Full scale measuremnt; Powered oscillation Re-attachment; Mean pressure; Fluctuating pressure; Quasi-static pressur; 準静的風圧力; 非定常風圧力; 大スパン屋根; 非定常空気力; 再附着; 剥離泡; 剥離せん断層; 強制振動

On chracteristics of wind preesure large span roofs. following resuits were obtained though wind tunnel tests. 1) Chracteristics of fluctuating wind pressures are effected by the re-attachment Point of separated flow over the roof. 2) Powerspctra of fluctuatinf g wind presures indicate peaks at the characteristic frequencys in cases of flat and sag roofs but for high rise roofs they have no predominant peak and are simlar to velocity powerspectra of oncoming flow. 3) Fuctuating wing pressures in the leeward of the the re-attachment point are convective with exponential decay of the corrlation. 4) Powerspectra of motion-induced wind pressures have predoinant peaks at the frequency of the motion and values of the peaks increase as the motion frequency close to the vortex shedding frequency.

大跨度屋面风压特性研究。通过风洞试验得到了以下结果：1)顶板上分离气流的再附着点对脉动风压特性有影响。2)波动风压功率谱在平屋顶和洼地屋顶的特征频率处出现峰值，而高层屋顶的波动风压功率谱没有主峰，与迎面流的速度功率谱相似。(3)再附着点下风翼压力为对流，相关系数呈指数衰减。(4)运动风压功率谱在运动频率处出现优势峰，运动频率越接近旋涡脱落频率，峰值值越高。

项目成果

OHKUMA, Takeshi: "Characteristics of Wind induced Fluctuating pressure on Large Span Roof" SUMNARIES OF TECHNICAL PAPERS OF ANNUAL MEETING ARCHITECUTURAL INSTITUE OF JAPAN. 1457-1458 (1987)

OHKUMA，Takeshi：“大跨度屋顶风致脉动压力的特征”日本建筑学会年会技术论文摘要。

OHKUMA, Takeshi: "Characteristis of Vibration-induced Wind Force on Large Span Roofs (Ill contribute)" PROCEEDINGS OF 10TH NATIONAL SYNPOSIUM ON WIND ENGINEERING. (1988)

大隈武：“大跨度屋顶振动诱发风力的特性（本人投稿）”第十届全国风能工程学术研讨会论文集。

大熊武司,丸川比佐夫: 日本建築学会大会学術講演梗概集. (1987)

Takeshi Okuma、Hisao Marukawa：日本建筑学会会议学术讲座摘要（1987）。

大熊武司: 第9回風工学シンポジウム論文集. 97-102 (1986)

Takeshi Okuma：第九届风工程研讨会论文集 97-102 (1986)。

OHKUMA, Takeshi: "The Chatacteristics of wind-induced Pressure on Large Span Roofs" PROCEEDINGS OF 9TH NATOINAL SYMPOSIUM ON WIND ENGINEERING. 97-102 (1986)

OHKUMA，Takeshi：“大跨度屋顶风致压力的特征”第九届全国风能工程研讨会论文集。